Rupert Grint also appears in a role that is a significant departure from his Potter persona Ron Weasley, in The Necessary Death of Charlie Countryman.

Grint plays a drug-loving, aspiring porn star (his porn name is Boris Pecker) who befriends Shia LaBeouf in the story set in seedy Bucharest, Romania. His character enjoys powerful hits of Viagra that go well beyond the recommended dosage.

In his Countryman role, Grint, 24, has the charm that has always endeared him to his fans, but in a very different context from the eight Potter films that ran from 2001 to 2011.

"He's so synonymous with the Harry Potter series, I think that's why he was so keen to do this," says Countryman director Fredrik Bond. "He's dying to be doing different stuff outside of the series and be acknowledged for it. He's an incredible actor. And it's so different from what he's done before. He had an amazing time.''

Grint is working on a project and was not able to attend Sundance for the Countryman world premiere Monday. But British comic James Buckley, who plays his best friend in the film, had nothing but praise for Grint's departure role.

"He was great to work with. I didn't think about Ron Weasley at all. Which is the way it should be."

The two improvised many of their comic scenes together with LaBeouf. But the fun stopped in a scene when Buckley and Grint's characters find themselves shirtless and glued together back-to-back by Romanian gangsters.

When Buckley was reading about the glue scene, he pondered what kind of special visual effects would be used to make them appear to be stuck together.

"But they actually just glued us together," says Buckley. "It was really painful. And I'm a bit hairier than Rupert and it was hurting me so much. I hated it so much. And it was raining. So we were glued together in the rain."

Adding to their woes: The glue took days to come off, sticking Buckley to his sheets at night. Buckley called Grint to ask him how he was coping. Grint responded with his own Harry Potter-like cure.

Says Buckley: "Rupert told me he was using the little vodka miniatures in the hotel bar. He said it was really helping to get the glue off.''